Segment, Geographic, Product and Significant Customer Information (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Total net revenue

The following tables summarize total net revenues and long-lived assets (excluding intangible assets) attributed to significant countries (in thousands)

	Three Months Ended
	March 31, 2018		April 1, 2017
Total net revenues (1):
South Korea	$	37,818	$	18,619
Japan		13,379		3,353
United States		6,738		13,573
China		8,042		6,687
Taiwan		1,060		11,833
Singapore		12,155		1,491
Other		3,121		3,758
Total net revenues	$	82,313	$	59,314

Long-lived tangible assets

	March 31, 2018		December 30, 2017
Long-lived tangible assets:
United States	$	42,473	$	43,427
International		1,322		1,383
Total long-lived tangible assets	$	43,795	$	44,810